[Bug libc/15137] New: linking static version of sem_open gets message "'mktemp' is dangerous, better use `mkstemp'"

[Bug libc/15137] New: linking static version of sem_open gets message "'mktemp' is dangerous, better use `mkstemp'"

[geir at cray dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=15137

             Bug #: 15137
           Summary: linking static version of sem_open gets message
                    "'mktemp' is dangerous, better use `mkstemp'"
           Product: glibc
           Version: 2.11
            Status: NEW
          Severity: normal
          Priority: P2
         Component: libc
        AssignedTo: unassigned@sourceware.org
        ReportedBy: geir@cray.com
                CC: drepper.fsp@gmail.com
    Classification: Unclassified


In the following test case that calls sem_open, a link time warning message is
produced when linked statically.  sem_open needs to be changed so that this
link time message no longer appears, as it is unacceptable that the use of a
supported system library routine produces this type of link time warning.

$ cat sem_open.c
#include <fcntl.h>
#include <semaphore.h>
#include <errno.h>

int main(int argc, char *argv[])
{
  sem_t *mutex;

  /* create, initialize semaphore */
  if ((mutex = sem_open("mysemaphore", O_CREAT, 0644, 1)) == SEM_FAILED)
      perror("semaphore initilization");

  return 0;
}

$ gcc -static sem_open.c -lpthread
/usr/lib/../lib64/libpthread.a(sem_open.o): In function `sem_open':
/usr/src/packages/BUILD/glibc-2.11.3/nptl/sem_open.c:333: warning: the use of
`mktemp' is dangerous, better use `mkstemp'
$ gcc sem_open.c -lpthread
$
$

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[Bug libc/15137] linking static version of sem_open gets message "'mktemp' is dangerous, better use `mkstemp'"

[ondra at iuuk dot mff.cuni.cz]

http://sourceware.org/bugzilla/show_bug.cgi?id=15137

OndrejBilka <ondra at iuuk dot mff.cuni.cz> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ondra at iuuk dot
                   |                            |mff.cuni.cz

--- Comment #1 from OndrejBilka <ondra at iuuk dot mff.cuni.cz> 2013-05-15 09:27:33 UTC ---
>From nptl/sem_open.c:

    /* We really want to use mktemp here.  We cannot use mkstemp
       since the file must be opened with a specific mode.  The
       mode cannot later be set since then we cannot apply the
       file create mask.  */

how we silence this warning?

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[Bug libc/15137] linking static version of sem_open gets message "'mktemp' is dangerous, better use `mkstemp'"

[schwab@linux-m68k.org]

http://sourceware.org/bugzilla/show_bug.cgi?id=15137

Andreas Schwab <schwab@linux-m68k.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |DUPLICATE

--- Comment #2 from Andreas Schwab <schwab@linux-m68k.org> 2013-05-15 09:45:18 UTC ---
.

*** This bug has been marked as a duplicate of bug 14327 ***

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[Bug libc/15137] linking static version of sem_open gets message "'mktemp' is dangerous, better use `mkstemp'"

[fweimer at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=15137

Florian Weimer <fweimer at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
              Flags|                            |security-

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